This is the optional Hot Racing Spline CVD Kit for the Traxxas 1/10 E-Revo / Maxx, Revo 3.3 / T-Maxx 3.3 /Summit FEATURES: CNC #45 Carbon steel construction Blue aluminum trim No set screw design Pin Capture Rings Black in color YOU WILL RECEIVE: Two Splined drive CV axles REQUIREMENTS: Installing on vehicle